Anchoring of Palladium onto Surface of Porous Metal–Organic
Framework through Post-Synthesis Modification and Studies on Suzuki
and Stille Coupling Reactions under Heterogeneous Condition
posted on 2016-02-19, 20:01authored byDebraj Saha, Rupam Sen, Tanmoy Maity, Subratanath Koner
An
ecofriendly solid catalyst has been synthesized by anchoring
palladium(II) into post synthetically modified metal organic framework
IRMOF-3. The pore of IRMOF-3 was first modified with pyridine-2-aldehyde.
The amine group of IRMOF-3 upon condensation with pyridine-2-aldehyde
afforded a bidentate Schiff base moiety in the porous matrix. The
Schiff base moieties were used to anchor palladium(II) ions. The prepared
catalyst has been characterized by UV–vis, IR spectroscopy,
X-ray powder diffraction, and nitrogen sorption measurements. Framework
structure of the catalyst is not being destroyed in the multistep
synthesis procedure as evidenced in X-ray powder diffraction studies.
The catalyst has shown high activity toward the Suzuki and Stille
cross-coupling reaction in 20% H2O/EtOH and EtOH medium,
respectively, at 80 °C. The immobilized complex did not leach
or decompose during the catalytic reactions, showing practical advantages
over the homogeneous catalysis.